Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-09-02
Journal of Magnetism and Magnetic Materials, e702-e704, (2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
2 pages, 2 figures, to appear in Journal of magnetism and magnetic materials
Scientific paper
10.1016/j.jmmm.2006.10.1029
The non-equilibrium transportation of two-dimensional electrons through a narrow channel is investigated under the influence of the Rashba interaction. By introducing suitable lifetime in the Green's function, the average spin values can be calculated from the ballistic regime to the diffusive regime. It is shown that the spin accumulation is a combined effect of the spin current and disorders. In the diffusive regime, disorders offer a mechanism to stop the spin current and generate the spin accumulation. In the ballistic regime, spins are more spread out and do not have definite signs. Further consideration indicates that the inclusion of ferromagnetic spin-spin interaction increases the spin accumulation near the edge.
Chang Ming-Che
Chin Yi-Ying
Chiu Jui-yu
Mou Chung-Yu
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